#include <QtWidgets>
#include <QList>
#include <QPrinter>
#include <QPrintDialog>
#include <QPainter>
#include "vmainwindow.h"
#include "vdirectorytree.h"
#include "vnote.h"
#include "vfilelist.h"
#include "vconfigmanager.h"
#include "utils/vutils.h"
#include "veditarea.h"
#include "voutline.h"
#include "vnotebookselector.h"
#include "dialog/vfindreplacedialog.h"
#include "dialog/vsettingsdialog.h"
#include "vcaptain.h"
#include "vedittab.h"
#include "vwebview.h"
#include "vexporter.h"
#include "vmdtab.h"
#include "vvimindicator.h"
#include "vtabindicator.h"
#include "dialog/vupdater.h"
#include "vorphanfile.h"
#include "dialog/vorphanfileinfodialog.h"
#include "vsingleinstanceguard.h"
#include "vnotefile.h"
#include "vbuttonwithwidget.h"
#include "vattachmentlist.h"
#include "vfilesessioninfo.h"
#include "vsnippetlist.h"
#include "vtoolbox.h"
#include "vbuttonmenuitem.h"
#include "vpalette.h"
#include "utils/viconutils.h"
#include "dialog/vtipsdialog.h"

extern VConfigManager *g_config;

extern VPalette *g_palette;

VMainWindow *g_mainWin;

VNote *g_vnote;

VWebUtils *g_webUtils;

const int VMainWindow::c_sharedMemTimerInterval = 1000;

#if defined(QT_NO_DEBUG)
extern QFile g_logFile;
#endif

#define COLOR_PIXMAP_ICON_SIZE 64


VMainWindow::VMainWindow(VSingleInstanceGuard *p_guard, QWidget *p_parent)
    : QMainWindow(p_parent), m_guard(p_guard),
      m_windowOldState(Qt::WindowNoState), m_requestQuit(false)
{
    qsrand(QDateTime::currentDateTime().toTime_t());

    g_mainWin = this;

    setWindowIcon(QIcon(":/resources/icons/vnote.ico"));

    vnote = new VNote(this);
    g_vnote = vnote;

    m_webUtils.init();
    g_webUtils = &m_webUtils;

    if (g_config->getEnableCompactMode()) {
        m_panelViewState = PanelViewState::CompactMode;
    } else {
        m_panelViewState = PanelViewState::TwoPanels;
    }

    initCaptain();

    setupUI();

    initMenuBar();

    initToolBar();

    initShortcuts();

    initDockWindows();

    changePanelView(m_panelViewState);

    restoreStateAndGeometry();

    setContextMenuPolicy(Qt::NoContextMenu);

    notebookSelector->update();

    initSharedMemoryWatcher();

    registerCaptainAndNavigationTargets();
}

void VMainWindow::initSharedMemoryWatcher()
{
    m_sharedMemTimer = new QTimer(this);
    m_sharedMemTimer->setSingleShot(false);
    m_sharedMemTimer->setInterval(c_sharedMemTimerInterval);
    connect(m_sharedMemTimer, &QTimer::timeout,
            this, &VMainWindow::checkSharedMemory);

    m_sharedMemTimer->start();
}

void VMainWindow::initCaptain()
{
    // VCaptain should be visible to accpet key focus. But VCaptain
    // may hide other widgets.
    m_captain = new VCaptain(this);
    connect(m_captain, &VCaptain::captainModeChanged,
            this, [this](bool p_captainMode) {
                static QString normalStyle = m_avatarBtn->styleSheet();
                static QString captainStyle = QString("color: %1; background: %2;")
                                                     .arg(g_palette->color("avatar_captain_mode_fg"))
                                                     .arg(g_palette->color("avatar_captain_mode_bg"));

                if (p_captainMode) {
                    m_avatarBtn->setStyleSheet(captainStyle);
                } else {
                    m_avatarBtn->setStyleSheet(normalStyle);
                }
            });
}

void VMainWindow::registerCaptainAndNavigationTargets()
{
    m_captain->registerNavigationTarget(notebookSelector);
    m_captain->registerNavigationTarget(directoryTree);
    m_captain->registerNavigationTarget(m_fileList);
    m_captain->registerNavigationTarget(editArea);
    m_captain->registerNavigationTarget(m_toolBox);
    m_captain->registerNavigationTarget(outline);
    m_captain->registerNavigationTarget(m_snippetList);

    // Register Captain mode targets.
    m_captain->registerCaptainTarget(tr("AttachmentList"),
                                     g_config->getCaptainShortcutKeySequence("AttachmentList"),
                                     this,
                                     showAttachmentListByCaptain);
    m_captain->registerCaptainTarget(tr("LocateCurrentFile"),
                                     g_config->getCaptainShortcutKeySequence("LocateCurrentFile"),
                                     this,
                                     locateCurrentFileByCaptain);
    m_captain->registerCaptainTarget(tr("ExpandMode"),
                                     g_config->getCaptainShortcutKeySequence("ExpandMode"),
                                     this,
                                     toggleExpandModeByCaptain);
    m_captain->registerCaptainTarget(tr("OnePanelView"),
                                     g_config->getCaptainShortcutKeySequence("OnePanelView"),
                                     this,
                                     toggleOnePanelViewByCaptain);
    m_captain->registerCaptainTarget(tr("DiscardAndRead"),
                                     g_config->getCaptainShortcutKeySequence("DiscardAndRead"),
                                     this,
                                     discardAndReadByCaptain);
    m_captain->registerCaptainTarget(tr("ToolsDock"),
                                     g_config->getCaptainShortcutKeySequence("ToolsDock"),
                                     this,
                                     toggleToolsDockByCaptain);
    m_captain->registerCaptainTarget(tr("CloseNote"),
                                     g_config->getCaptainShortcutKeySequence("CloseNote"),
                                     this,
                                     closeFileByCaptain);
    m_captain->registerCaptainTarget(tr("ShortcutsHelp"),
                                     g_config->getCaptainShortcutKeySequence("ShortcutsHelp"),
                                     this,
                                     shortcutsHelpByCaptain);
    m_captain->registerCaptainTarget(tr("FlushLogFile"),
                                     g_config->getCaptainShortcutKeySequence("FlushLogFile"),
                                     this,
                                     flushLogFileByCaptain);
}

void VMainWindow::setupUI()
{
    QWidget *directoryPanel = setupDirectoryPanel();

    m_fileList = new VFileList();
    m_fileList->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Expanding);

    editArea = new VEditArea();
    editArea->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    m_findReplaceDialog = editArea->getFindReplaceDialog();
    m_fileList->setEditArea(editArea);
    directoryTree->setEditArea(editArea);

    // Main Splitter
    m_mainSplitter = new QSplitter();
    m_mainSplitter->setObjectName("MainSplitter");
    m_mainSplitter->addWidget(directoryPanel);
    m_mainSplitter->addWidget(m_fileList);
    setTabOrder(directoryTree, m_fileList->getContentWidget());
    m_mainSplitter->addWidget(editArea);
    m_mainSplitter->setStretchFactor(0, 0);
    m_mainSplitter->setStretchFactor(1, 0);
    m_mainSplitter->setStretchFactor(2, 1);

    // Signals
    connect(directoryTree, &VDirectoryTree::currentDirectoryChanged,
            m_fileList, &VFileList::setDirectory);
    connect(directoryTree, &VDirectoryTree::directoryUpdated,
            editArea, &VEditArea::handleDirectoryUpdated);

    connect(notebookSelector, &VNotebookSelector::notebookUpdated,
            editArea, &VEditArea::handleNotebookUpdated);
    connect(notebookSelector, &VNotebookSelector::notebookCreated,
            directoryTree, [this](const QString &p_name, bool p_import) {
                Q_UNUSED(p_name);
                if (!p_import) {
                    directoryTree->newRootDirectory();
                }
            });

    connect(m_fileList, &VFileList::fileClicked,
            editArea, &VEditArea::openFile);
    connect(m_fileList, &VFileList::fileCreated,
            editArea, &VEditArea::openFile);
    connect(m_fileList, &VFileList::fileUpdated,
            editArea, &VEditArea::handleFileUpdated);
    connect(editArea, &VEditArea::tabStatusUpdated,
            this, &VMainWindow::handleAreaTabStatusUpdated);
    connect(editArea, &VEditArea::statusMessage,
            this, &VMainWindow::showStatusMessage);
    connect(editArea, &VEditArea::vimStatusUpdated,
            this, &VMainWindow::handleVimStatusUpdated);
    connect(m_findReplaceDialog, &VFindReplaceDialog::findTextChanged,
            this, &VMainWindow::handleFindDialogTextChanged);

    setCentralWidget(m_mainSplitter);

    m_vimIndicator = new VVimIndicator(this);
    m_vimIndicator->hide();

    m_tabIndicator = new VTabIndicator(this);
    m_tabIndicator->hide();

    // Create and show the status bar
    statusBar()->addPermanentWidget(m_vimIndicator);
    statusBar()->addPermanentWidget(m_tabIndicator);

    initTrayIcon();
}

QWidget *VMainWindow::setupDirectoryPanel()
{
    // Notebook selector.
    notebookLabel = new QLabel(tr("Notebooks"));
    notebookLabel->setProperty("TitleLabel", true);
    notebookLabel->setProperty("NotebookPanel", true);

    notebookSelector = new VNotebookSelector();
    notebookSelector->setObjectName("NotebookSelector");
    notebookSelector->setProperty("NotebookPanel", true);
    notebookSelector->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLengthWithIcon);

    // Navigation panel.
    directoryLabel = new QLabel(tr("Folders"));
    directoryLabel->setProperty("TitleLabel", true);
    directoryLabel->setProperty("NotebookPanel", true);

    directoryTree = new VDirectoryTree;
    directoryTree->setProperty("NotebookPanel", true);

    QVBoxLayout *naviLayout = new QVBoxLayout;
    naviLayout->addWidget(directoryLabel);
    naviLayout->addWidget(directoryTree);
    naviLayout->setContentsMargins(0, 0, 0, 0);
    naviLayout->setSpacing(0);
    QWidget *naviWidget = new QWidget();
    naviWidget->setLayout(naviLayout);

    QWidget *tmpWidget = new QWidget();

    // Compact splitter.
    m_naviSplitter = new QSplitter();
    m_naviSplitter->setOrientation(Qt::Vertical);
    m_naviSplitter->setObjectName("NaviSplitter");
    m_naviSplitter->addWidget(naviWidget);
    m_naviSplitter->addWidget(tmpWidget);
    m_naviSplitter->setStretchFactor(0, 0);
    m_naviSplitter->setStretchFactor(1, 1);

    tmpWidget->hide();

    QVBoxLayout *nbLayout = new QVBoxLayout;
    nbLayout->addWidget(notebookLabel);
    nbLayout->addWidget(notebookSelector);
    nbLayout->addWidget(m_naviSplitter);
    nbLayout->setContentsMargins(0, 0, 0, 0);
    nbLayout->setSpacing(0);
    QWidget *nbContainer = new QWidget();
    nbContainer->setObjectName("NotebookPanel");
    nbContainer->setLayout(nbLayout);
    nbContainer->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Expanding);

    connect(notebookSelector, &VNotebookSelector::curNotebookChanged,
            this, [this](VNotebook *p_notebook) {
                directoryTree->setNotebook(p_notebook);
                directoryTree->setFocus();
            });

    connect(notebookSelector, &VNotebookSelector::curNotebookChanged,
            this, &VMainWindow::handleCurrentNotebookChanged);

    connect(directoryTree, &VDirectoryTree::currentDirectoryChanged,
            this, &VMainWindow::handleCurrentDirectoryChanged);

    return nbContainer;
}

void VMainWindow::initToolBar()
{
    const int tbIconSize = g_config->getToolBarIconSize() * VUtils::calculateScaleFactor();
    QSize iconSize(tbIconSize, tbIconSize);

    initFileToolBar(iconSize);
    initViewToolBar(iconSize);
    initEditToolBar(iconSize);
    initNoteToolBar(iconSize);
}

void VMainWindow::initViewToolBar(QSize p_iconSize)
{
    QToolBar *viewToolBar = addToolBar(tr("View"));
    viewToolBar->setObjectName("ViewToolBar");
    viewToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        viewToolBar->setIconSize(p_iconSize);
    }

    m_viewActGroup = new QActionGroup(this);
    QAction *onePanelViewAct = new QAction(VIconUtils::menuIcon(":/resources/icons/one_panel.svg"),
                                           tr("Single Panel"),
                                           m_viewActGroup);
    QString keyText = VUtils::getCaptainShortcutSequenceText("OnePanelView");
    if (!keyText.isEmpty()) {
        onePanelViewAct->setText(tr("Single Panel\t%1").arg(keyText));
    }

    onePanelViewAct->setStatusTip(tr("Display only the notes list panel"));
    onePanelViewAct->setCheckable(true);
    onePanelViewAct->setData((int)PanelViewState::SinglePanel);

    QAction *twoPanelViewAct = new QAction(VIconUtils::menuIcon(":/resources/icons/two_panels.svg"),
                                           tr("Two Panels"),
                                           m_viewActGroup);
    keyText = VUtils::getCaptainShortcutSequenceText("OnePanelView");
    if (!keyText.isEmpty()) {
        twoPanelViewAct->setText(tr("Two Panels\t%1").arg(keyText));
    }

    twoPanelViewAct->setStatusTip(tr("Display both the folders and notes list panel"));
    twoPanelViewAct->setCheckable(true);
    twoPanelViewAct->setData((int)PanelViewState::TwoPanels);

    QAction *compactViewAct = new QAction(VIconUtils::menuIcon(":/resources/icons/compact_mode.svg"),
                                           tr("Compact Mode"),
                                           m_viewActGroup);
    compactViewAct->setStatusTip(tr("Integrate the folders and notes list panel in one column"));
    compactViewAct->setCheckable(true);
    compactViewAct->setData((int)PanelViewState::CompactMode);

    connect(m_viewActGroup, &QActionGroup::triggered,
            this, [this](QAction *p_action) {
                if (!p_action) {
                    return;
                }

                int act = p_action->data().toInt();
                switch (act) {
                case (int)PanelViewState::SinglePanel:
                    onePanelView();
                    break;

                case (int)PanelViewState::TwoPanels:
                    twoPanelView();
                    break;

                case (int)PanelViewState::CompactMode:
                    compactModeView();
                    break;

                default:
                    break;
                }
            });

    QMenu *panelMenu = new QMenu(this);
    panelMenu->setToolTipsVisible(true);
    panelMenu->addAction(onePanelViewAct);
    panelMenu->addAction(twoPanelViewAct);
    panelMenu->addAction(compactViewAct);

    expandViewAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/expand.svg"),
                                tr("Expand"), this);
    keyText = VUtils::getCaptainShortcutSequenceText("ExpandMode");
    if (!keyText.isEmpty()) {
        expandViewAct->setText(tr("Expand\t%1").arg(keyText));
    }

    expandViewAct->setStatusTip(tr("Expand the edit area"));
    expandViewAct->setCheckable(true);
    expandViewAct->setMenu(panelMenu);
    connect(expandViewAct, &QAction::triggered,
            this, [this](bool p_checked) {
                // Recover m_panelViewState or change to expand mode.
                changePanelView(p_checked ? PanelViewState::ExpandMode
                                          : m_panelViewState);
            });

    viewToolBar->addAction(expandViewAct);
}

// Enable/disable all actions of @p_widget.
static void setActionsEnabled(QWidget *p_widget, bool p_enabled)
{
    Q_ASSERT(p_widget);
    QList<QAction *> actions = p_widget->actions();
    for (auto const & act : actions) {
        act->setEnabled(p_enabled);
    }
}

void VMainWindow::initEditToolBar(QSize p_iconSize)
{
    m_editToolBar = addToolBar(tr("Edit Toolbar"));
    m_editToolBar->setObjectName("EditToolBar");
    m_editToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        m_editToolBar->setIconSize(p_iconSize);
    }

    m_editToolBar->addSeparator();

    m_headingSequenceAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/heading_sequence.svg"),
                                       tr("Heading Sequence"),
                                       this);
    m_headingSequenceAct->setStatusTip(tr("Enable heading sequence in current note in edit mode"));
    m_headingSequenceAct->setCheckable(true);
    connect(m_headingSequenceAct, &QAction::triggered,
            this, [this](bool p_checked){
                if (isHeadingSequenceApplicable()) {
                    VMdTab *tab = dynamic_cast<VMdTab *>(m_curTab.data());
                    Q_ASSERT(tab);
                    tab->enableHeadingSequence(p_checked);
                }
            });

    m_editToolBar->addAction(m_headingSequenceAct);

    initHeadingButton(m_editToolBar);

    QAction *boldAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/bold.svg"),
                                   tr("Bold\t%1").arg(VUtils::getShortcutText("Ctrl+B")),
                                   this);
    boldAct->setStatusTip(tr("Insert bold text or change selected text to bold"));
    connect(boldAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::Bold);
                }
            });

    m_editToolBar->addAction(boldAct);

    QAction *italicAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/italic.svg"),
                                     tr("Italic\t%1").arg(VUtils::getShortcutText("Ctrl+I")),
                                     this);
    italicAct->setStatusTip(tr("Insert italic text or change selected text to italic"));
    connect(italicAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::Italic);
                }
            });

    m_editToolBar->addAction(italicAct);

    QAction *strikethroughAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/strikethrough.svg"),
                                            tr("Strikethrough\t%1").arg(VUtils::getShortcutText("Ctrl+D")),
                                            this);
    strikethroughAct->setStatusTip(tr("Insert strikethrough text or change selected text to strikethroughed"));
    connect(strikethroughAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::Strikethrough);
                }
            });

    m_editToolBar->addAction(strikethroughAct);

    QAction *inlineCodeAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/inline_code.svg"),
                                         tr("Inline Code\t%1").arg(VUtils::getShortcutText("Ctrl+K")),
                                         this);
    inlineCodeAct->setStatusTip(tr("Insert inline-code text or change selected text to inline-coded"));
    connect(inlineCodeAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::InlineCode);
                }
            });

    m_editToolBar->addAction(inlineCodeAct);

    QAction *codeBlockAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/code_block.svg"),
                                        tr("Code Block\t%1").arg(VUtils::getShortcutText("Ctrl+M")),
                                        this);
    codeBlockAct->setStatusTip(tr("Insert fenced code block text or wrap selected text into a fenced code block"));
    connect(codeBlockAct, &QAction::triggered,
            this, [this](){
                if (m_curTab) {
                    m_curTab->decorateText(TextDecoration::CodeBlock);
                }
            });

    m_editToolBar->addAction(codeBlockAct);

    // Insert link.
    QAction *insetLinkAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/link.svg"),
                                        tr("Insert Link\t%1").arg(VUtils::getShortcutText("Ctrl+L")),
                                        this);
    insetLinkAct->setStatusTip(tr("Insert a link"));
    connect(insetLinkAct, &QAction::triggered,
            this, [this]() {
                if (m_curTab) {
                    m_curTab->insertLink();
                }
            });

    m_editToolBar->addAction(insetLinkAct);

    // Insert image.
    QAction *insertImageAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/insert_image.svg"),
                                          tr("Insert Image\t%1").arg(VUtils::getShortcutText("Ctrl+'")),
                                          this);
    insertImageAct->setStatusTip(tr("Insert an image from file or URL"));
    connect(insertImageAct, &QAction::triggered,
            this, [this]() {
                if (m_curTab) {
                    m_curTab->insertImage();
                }
            });

    m_editToolBar->addAction(insertImageAct);

    QAction *toggleAct = m_editToolBar->toggleViewAction();
    toggleAct->setToolTip(tr("Toggle the edit toolbar"));
    viewMenu->addAction(toggleAct);

    setActionsEnabled(m_editToolBar, false);
}

void VMainWindow::initNoteToolBar(QSize p_iconSize)
{
    QToolBar *noteToolBar = addToolBar(tr("Note Toolbar"));
    noteToolBar->setObjectName("NoteToolBar");
    noteToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        noteToolBar->setIconSize(p_iconSize);
    }

    noteToolBar->addSeparator();

    // Attachment.
    m_attachmentList = new VAttachmentList(this);
    m_attachmentBtn = new VButtonWithWidget(VIconUtils::toolButtonIcon(":/resources/icons/attachment.svg"),
                                            "",
                                            m_attachmentList,
                                            this);
    m_attachmentBtn->setBubbleColor(g_palette->color("bubble_fg"),
                                    g_palette->color("bubble_bg"));
    m_attachmentBtn->setToolTip(tr("Attachments (drag files here to add attachments)"));
    m_attachmentBtn->setProperty("CornerBtn", true);
    m_attachmentBtn->setFocusPolicy(Qt::NoFocus);
    m_attachmentBtn->setEnabled(false);

    QAction *flashPageAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/flash_page.svg"),
                                        tr("Flash Page"),
                                        this);
    flashPageAct->setStatusTip(tr("Open the Flash Page to edit"));
    QString keySeq = g_config->getShortcutKeySequence("FlashPage");
    QKeySequence seq(keySeq);
    if (!seq.isEmpty()) {
        flashPageAct->setText(tr("Flash Page\t%1").arg(VUtils::getShortcutText(keySeq)));
        flashPageAct->setShortcut(seq);
    }

    connect(flashPageAct, &QAction::triggered,
            this, &VMainWindow::openFlashPage);

    noteToolBar->addWidget(m_attachmentBtn);
    noteToolBar->addAction(flashPageAct);
}

void VMainWindow::initFileToolBar(QSize p_iconSize)
{
    QToolBar *fileToolBar = addToolBar(tr("Note"));
    fileToolBar->setObjectName("NoteToolBar");
    fileToolBar->setMovable(false);
    if (p_iconSize.isValid()) {
        fileToolBar->setIconSize(p_iconSize);
    }

    m_avatarBtn = new QPushButton("VNote", this);
    m_avatarBtn->setProperty("AvatarBtn", true);
    m_avatarBtn->setFocusPolicy(Qt::NoFocus);
    m_avatarBtn->setToolTip(tr("Log In (Not Implemented Yet)"));

    newRootDirAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/create_rootdir_tb.svg"),
                                tr("New Root Folder"),
                                this);
    newRootDirAct->setStatusTip(tr("Create a root folder in current notebook"));
    connect(newRootDirAct, &QAction::triggered,
            directoryTree, &VDirectoryTree::newRootDirectory);

    newNoteAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/create_note_tb.svg"),
                             tr("New Note"), this);
    newNoteAct->setStatusTip(tr("Create a note in current folder"));
    QString keySeq = g_config->getShortcutKeySequence("NewNote");
    QKeySequence seq(keySeq);
    if (!seq.isEmpty()) {
        newNoteAct->setText(tr("New Note\t%1").arg(VUtils::getShortcutText(keySeq)));
        newNoteAct->setShortcut(seq);
    }

    connect(newNoteAct, &QAction::triggered,
            m_fileList, &VFileList::newFile);

    noteInfoAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/note_info_tb.svg"),
                              tr("Note Info"), this);
    noteInfoAct->setStatusTip(tr("View and edit current note's information"));
    connect(noteInfoAct, &QAction::triggered,
            this, &VMainWindow::curEditFileInfo);

    deleteNoteAct = new QAction(VIconUtils::toolButtonDangerIcon(":/resources/icons/delete_note_tb.svg"),
                                tr("Delete Note"), this);
    deleteNoteAct->setStatusTip(tr("Delete current note"));
    connect(deleteNoteAct, &QAction::triggered,
            this, &VMainWindow::deleteCurNote);

    editNoteAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/edit_note.svg"),
                              tr("Edit"), this);
    editNoteAct->setStatusTip(tr("Edit current note"));
    keySeq = g_config->getShortcutKeySequence("EditNote");
    seq = QKeySequence(keySeq);
    if (!seq.isEmpty()) {
        editNoteAct->setText(tr("Edit\t%1").arg(VUtils::getShortcutText(keySeq)));
        editNoteAct->setShortcut(seq);
    }

    connect(editNoteAct, &QAction::triggered,
            editArea, &VEditArea::editFile);

    discardExitAct = new QAction(VIconUtils::menuIcon(":/resources/icons/discard_exit.svg"),
                                 tr("Discard Changes And Read"), this);
    QString keyText = VUtils::getCaptainShortcutSequenceText("DiscardAndRead");
    if (!keyText.isEmpty()) {
        discardExitAct->setText(tr("Discard Changes And Read\t%1").arg(keyText));
    }

    discardExitAct->setStatusTip(tr("Discard changes and exit edit mode"));
    connect(discardExitAct, &QAction::triggered,
            editArea, &VEditArea::readFile);

    QMenu *exitEditMenu = new QMenu(this);
    exitEditMenu->setToolTipsVisible(true);
    exitEditMenu->addAction(discardExitAct);

    saveExitAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/save_exit.svg"),
                              tr("Save Changes And Read"), this);
    saveExitAct->setStatusTip(tr("Save changes and exit edit mode"));
    saveExitAct->setMenu(exitEditMenu);
    keySeq = g_config->getShortcutKeySequence("SaveAndRead");
    seq = QKeySequence(keySeq);
    if (!seq.isEmpty()) {
        saveExitAct->setText(tr("Save Changes And Read\t%1").arg(VUtils::getShortcutText(keySeq)));
        saveExitAct->setShortcut(seq);
    }

    connect(saveExitAct, &QAction::triggered,
            editArea, &VEditArea::saveAndReadFile);

    saveNoteAct = new QAction(VIconUtils::toolButtonIcon(":/resources/icons/save_note.svg"),
                              tr("Save"), this);
    saveNoteAct->setStatusTip(tr("Save changes to current note"));
    keySeq = g_config->getShortcutKeySequence("SaveNote");
    seq = QKeySequence(keySeq);
    if (!seq.isEmpty()) {
        saveNoteAct->setText(tr("Save\t%1").arg(VUtils::getShortcutText(keySeq)));
        saveNoteAct->setShortcut(seq);
    }

    connect(saveNoteAct, &QAction::triggered,
            editArea, &VEditArea::saveFile);

    newRootDirAct->setEnabled(false);
    newNoteAct->setEnabled(false);
    noteInfoAct->setEnabled(false);
    deleteNoteAct->setEnabled(false);
    editNoteAct->setEnabled(false);
    saveExitAct->setVisible(false);
    discardExitAct->setVisible(false);
    saveNoteAct->setEnabled(false);

    fileToolBar->addWidget(m_avatarBtn);
    fileToolBar->addAction(newRootDirAct);
    fileToolBar->addAction(newNoteAct);
    fileToolBar->addAction(deleteNoteAct);
    fileToolBar->addAction(noteInfoAct);
    fileToolBar->addAction(editNoteAct);
    fileToolBar->addAction(saveExitAct);
    fileToolBar->addAction(saveNoteAct);
}

void VMainWindow::initMenuBar()
{
    initFileMenu();
    initEditMenu();
    initViewMenu();
    initMarkdownMenu();
    initHelpMenu();
}

void VMainWindow::initHelpMenu()
{
    QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
    helpMenu->setToolTipsVisible(true);

#if defined(QT_NO_DEBUG)
    QAction *logAct = new QAction(tr("View &Log"), this);
    logAct->setToolTip(tr("View VNote's debug log (%1)").arg(g_config->getLogFilePath()));
    connect(logAct, &QAction::triggered,
            this, [](){
                QUrl url = QUrl::fromLocalFile(g_config->getLogFilePath());
                QDesktopServices::openUrl(url);
            });
#endif

    QAction *shortcutAct = new QAction(tr("&Shortcuts Help"), this);
    shortcutAct->setToolTip(tr("View information about shortcut keys"));
    connect(shortcutAct, &QAction::triggered,
            this, &VMainWindow::shortcutsHelp);

    QAction *mdGuideAct = new QAction(tr("&Markdown Guide"), this);
    mdGuideAct->setToolTip(tr("A quick guide of Markdown syntax"));
    connect(mdGuideAct, &QAction::triggered,
            this, [this](){
                QString docFile = VUtils::getDocFile(VNote::c_markdownGuideDocFile);
                VFile *file = vnote->getOrphanFile(docFile, false, true);
                editArea->openFile(file, OpenFileMode::Read);
            });

    QAction *wikiAct = new QAction(tr("&Wiki"), this);
    wikiAct->setToolTip(tr("View VNote's wiki on Github"));
    connect(wikiAct, &QAction::triggered,
            this, [this]() {
                QString url("https://github.com/tamlok/vnote/wiki");
                QDesktopServices::openUrl(url);
            });

    QAction *updateAct = new QAction(tr("Check For &Updates"), this);
    updateAct->setToolTip(tr("Check for updates of VNote"));
    connect(updateAct, &QAction::triggered,
            this, [this](){
                VUpdater updater(this);
                updater.exec();
            });

    QAction *starAct = new QAction(tr("Star VNote on &Github"), this);
    starAct->setToolTip(tr("Give a star to VNote on Github project"));
    connect(starAct, &QAction::triggered,
            this, [this]() {
                QString url("https://github.com/tamlok/vnote");
                QDesktopServices::openUrl(url);
            });

    QAction *feedbackAct = new QAction(tr("&Feedback"), this);
    feedbackAct->setToolTip(tr("Open an issue on Github"));
    connect(feedbackAct, &QAction::triggered,
            this, [this]() {
                QString url("https://github.com/tamlok/vnote/issues");
                QDesktopServices::openUrl(url);
            });

    QAction *aboutAct = new QAction(tr("&About VNote"), this);
    aboutAct->setToolTip(tr("View information about VNote"));
    aboutAct->setMenuRole(QAction::AboutRole);
    connect(aboutAct, &QAction::triggered,
            this, &VMainWindow::aboutMessage);

    QAction *aboutQtAct = new QAction(tr("About &Qt"), this);
    aboutQtAct->setToolTip(tr("View information about Qt"));
    aboutQtAct->setMenuRole(QAction::AboutQtRole);
    connect(aboutQtAct, &QAction::triggered,
            qApp, &QApplication::aboutQt);

    helpMenu->addAction(shortcutAct);
    helpMenu->addAction(mdGuideAct);
    helpMenu->addAction(wikiAct);
    helpMenu->addAction(updateAct);
    helpMenu->addAction(starAct);
    helpMenu->addAction(feedbackAct);

#if defined(QT_NO_DEBUG)
    helpMenu->addAction(logAct);
#endif

    helpMenu->addAction(aboutQtAct);
    helpMenu->addAction(aboutAct);
}

void VMainWindow::initMarkdownMenu()
{
    QMenu *markdownMenu = menuBar()->addMenu(tr("&Markdown"));
    markdownMenu->setToolTipsVisible(true);

    initConverterMenu(markdownMenu);

    initMarkdownitOptionMenu(markdownMenu);

    markdownMenu->addSeparator();

    initRenderStyleMenu(markdownMenu);

    initRenderBackgroundMenu(markdownMenu);

    initCodeBlockStyleMenu(markdownMenu);

    QAction *constrainImageAct = new QAction(tr("Constrain The Width of Images"), this);
    constrainImageAct->setToolTip(tr("Constrain the width of images to the window in read mode (re-open current tabs to make it work)"));
    constrainImageAct->setCheckable(true);
    connect(constrainImageAct, &QAction::triggered,
            this, &VMainWindow::enableImageConstraint);
    markdownMenu->addAction(constrainImageAct);
    constrainImageAct->setChecked(g_config->getEnableImageConstraint());

    QAction *imageCaptionAct = new QAction(tr("Enable Image Caption"), this);
    imageCaptionAct->setToolTip(tr("Center the images and display the alt text as caption (re-open current tabs to make it work)"));
    imageCaptionAct->setCheckable(true);
    connect(imageCaptionAct, &QAction::triggered,
            this, &VMainWindow::enableImageCaption);
    markdownMenu->addAction(imageCaptionAct);
    imageCaptionAct->setChecked(g_config->getEnableImageCaption());

    markdownMenu->addSeparator();

    QAction *mermaidAct = new QAction(tr("&Mermaid Diagram"), this);
    mermaidAct->setToolTip(tr("Enable Mermaid for graph and diagram"));
    mermaidAct->setCheckable(true);
    connect(mermaidAct, &QAction::triggered,
            this, &VMainWindow::enableMermaid);
    markdownMenu->addAction(mermaidAct);

    mermaidAct->setChecked(g_config->getEnableMermaid());

    QAction *flowchartAct = new QAction(tr("&Flowchart.js"), this);
    flowchartAct->setToolTip(tr("Enable Flowchart.js for flowchart diagram"));
    flowchartAct->setCheckable(true);
    connect(flowchartAct, &QAction::triggered,
            this, [this](bool p_enabled){
                g_config->setEnableFlowchart(p_enabled);
            });
    markdownMenu->addAction(flowchartAct);
    flowchartAct->setChecked(g_config->getEnableFlowchart());

    QAction *mathjaxAct = new QAction(tr("Math&Jax"), this);
    mathjaxAct->setToolTip(tr("Enable MathJax for math support in Markdown"));
    mathjaxAct->setCheckable(true);
    connect(mathjaxAct, &QAction::triggered,
            this, &VMainWindow::enableMathjax);
    markdownMenu->addAction(mathjaxAct);

    mathjaxAct->setChecked(g_config->getEnableMathjax());

    markdownMenu->addSeparator();

    QAction *codeBlockAct = new QAction(tr("Highlight Code Blocks In Edit Mode"), this);
    codeBlockAct->setToolTip(tr("Enable syntax highlight within code blocks in edit mode"));
    codeBlockAct->setCheckable(true);
    connect(codeBlockAct, &QAction::triggered,
            this, &VMainWindow::enableCodeBlockHighlight);
    markdownMenu->addAction(codeBlockAct);
    codeBlockAct->setChecked(g_config->getEnableCodeBlockHighlight());

    QAction *lineNumberAct = new QAction(tr("Display Line Number In Code Blocks"), this);
    lineNumberAct->setToolTip(tr("Enable line number in code blocks in read mode"));
    lineNumberAct->setCheckable(true);
    connect(lineNumberAct, &QAction::triggered,
            this, [this](bool p_checked){
                g_config->setEnableCodeBlockLineNumber(p_checked);
            });
    markdownMenu->addAction(lineNumberAct);
    lineNumberAct->setChecked(g_config->getEnableCodeBlockLineNumber());

    QAction *previewImageAct = new QAction(tr("Preview Images In Edit Mode"), this);
    previewImageAct->setToolTip(tr("Enable image preview in edit mode (re-open current tabs to make it work)"));
    previewImageAct->setCheckable(true);
    connect(previewImageAct, &QAction::triggered,
            this, &VMainWindow::enableImagePreview);
    markdownMenu->addAction(previewImageAct);
    previewImageAct->setChecked(g_config->getEnablePreviewImages());

    QAction *previewWidthAct = new QAction(tr("Constrain The Width Of Previewed Images"), this);
    previewWidthAct->setToolTip(tr("Constrain the width of previewed images to the edit window in edit mode"));
    previewWidthAct->setCheckable(true);
    connect(previewWidthAct, &QAction::triggered,
            this, &VMainWindow::enableImagePreviewConstraint);
    markdownMenu->addAction(previewWidthAct);
    previewWidthAct->setChecked(g_config->getEnablePreviewImageConstraint());
}

void VMainWindow::initViewMenu()
{
    viewMenu = menuBar()->addMenu(tr("&View"));
    viewMenu->setToolTipsVisible(true);
}

void VMainWindow::initFileMenu()
{
    QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
    fileMenu->setToolTipsVisible(true);

    // Open external files.
    QAction *openAct = new QAction(tr("&Open"), this);
    openAct->setToolTip(tr("Open external file to edit"));
    connect(openAct, &QAction::triggered,
            this, [this](){
                static QString lastPath = QDir::homePath();
                QStringList files = QFileDialog::getOpenFileNames(this,
                                                                  tr("Select External Files To Open"),
                                                                  lastPath);

                if (files.isEmpty()) {
                    return;
                }

                // Update lastPath
                lastPath = QFileInfo(files[0]).path();

                openFiles(VUtils::filterFilePathsToOpen(files));
            });

    fileMenu->addAction(openAct);

    // Import notes from files.
    m_importNoteAct = newAction(VIconUtils::menuIcon(":/resources/icons/import_note.svg"),
                                tr("&New Notes From Files"), this);
    m_importNoteAct->setToolTip(tr("Create notes from external files in current folder by copy"));
    connect(m_importNoteAct, &QAction::triggered,
            this, &VMainWindow::importNoteFromFile);
    m_importNoteAct->setEnabled(false);

    fileMenu->addAction(m_importNoteAct);

    fileMenu->addSeparator();

    // Export as PDF.
    m_exportAsPDFAct = new QAction(tr("Export As &PDF"), this);
    m_exportAsPDFAct->setToolTip(tr("Export current note as PDF file"));
    connect(m_exportAsPDFAct, &QAction::triggered,
            this, &VMainWindow::exportAsPDF);
    m_exportAsPDFAct->setEnabled(false);

    fileMenu->addAction(m_exportAsPDFAct);

    fileMenu->addSeparator();

    // Print.
    m_printAct = new QAction(VIconUtils::menuIcon(":/resources/icons/print.svg"),
                             tr("&Print"), this);
    m_printAct->setToolTip(tr("Print current note"));
    connect(m_printAct, &QAction::triggered,
            this, &VMainWindow::printNote);
    m_printAct->setEnabled(false);

    // Themes.
    initThemeMenu(fileMenu);

    // Settings.
    QAction *settingsAct = newAction(VIconUtils::menuIcon(":/resources/icons/settings.svg"),
                                     tr("&Settings"), this);
    settingsAct->setToolTip(tr("View and change settings for VNote"));
    settingsAct->setMenuRole(QAction::PreferencesRole);
    connect(settingsAct, &QAction::triggered,
            this, &VMainWindow::viewSettings);

    fileMenu->addAction(settingsAct);

    QAction *openConfigAct = new QAction(tr("Open Configuration Folder"), this);
    openConfigAct->setToolTip(tr("Open configuration folder of VNote"));
    connect(openConfigAct, &QAction::triggered,
            this, [this](){
                QUrl url = QUrl::fromLocalFile(g_config->getConfigFolder());
                QDesktopServices::openUrl(url);
            });

    fileMenu->addAction(openConfigAct);

    QAction *customShortcutAct = new QAction(tr("Custom Shortcuts"), this);
    customShortcutAct->setToolTip(tr("Custom some standard shortcuts"));
    connect(customShortcutAct, &QAction::triggered,
            this, &VMainWindow::customShortcut);

    fileMenu->addAction(customShortcutAct);

    fileMenu->addSeparator();

    // Exit.
    QAction *exitAct = new QAction(tr("&Quit"), this);
    exitAct->setToolTip(tr("Quit VNote"));
    exitAct->setShortcut(QKeySequence("Ctrl+Q"));
    exitAct->setMenuRole(QAction::QuitRole);
    connect(exitAct, &QAction::triggered,
            this, &VMainWindow::quitApp);

    fileMenu->addAction(exitAct);
}

void VMainWindow::quitApp()
{
    m_requestQuit = true;
    close();
}

void VMainWindow::initEditMenu()
{
    QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
    editMenu->setToolTipsVisible(true);

    // Find/Replace.
    m_findReplaceAct = newAction(VIconUtils::menuIcon(":/resources/icons/find_replace.svg"),
                                 tr("Find/Replace"), this);
    m_findReplaceAct->setToolTip(tr("Open Find/Replace dialog to search in current note"));
    QString keySeq = g_config->getShortcutKeySequence("Find");
    qDebug() << "set Find shortcut to" << keySeq;
    m_findReplaceAct->setShortcut(QKeySequence(keySeq));
    connect(m_findReplaceAct, &QAction::triggered,
            this, &VMainWindow::openFindDialog);

    m_findNextAct = new QAction(tr("Find Next"), this);
    m_findNextAct->setToolTip(tr("Find next occurence"));
    keySeq = g_config->getShortcutKeySequence("FindNext");
    qDebug() << "set FindNext shortcut to" << keySeq;
    m_findNextAct->setShortcut(QKeySequence(keySeq));
    connect(m_findNextAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(findNext()));

    m_findPreviousAct = new QAction(tr("Find Previous"), this);
    m_findPreviousAct->setToolTip(tr("Find previous occurence"));
    keySeq = g_config->getShortcutKeySequence("FindPrevious");
    qDebug() << "set FindPrevious shortcut to" << keySeq;
    m_findPreviousAct->setShortcut(QKeySequence(keySeq));
    connect(m_findPreviousAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(findPrevious()));

    m_replaceAct = new QAction(tr("Replace"), this);
    m_replaceAct->setToolTip(tr("Replace current occurence"));
    connect(m_replaceAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(replace()));

    m_replaceFindAct = new QAction(tr("Replace && Find"), this);
    m_replaceFindAct->setToolTip(tr("Replace current occurence and find the next one"));
    connect(m_replaceFindAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(replaceFind()));

    m_replaceAllAct = new QAction(tr("Replace All"), this);
    m_replaceAllAct->setToolTip(tr("Replace all occurences in current note"));
    connect(m_replaceAllAct, SIGNAL(triggered(bool)),
            m_findReplaceDialog, SLOT(replaceAll()));

    QAction *searchedWordAct = new QAction(tr("Highlight Searched Pattern"), this);
    searchedWordAct->setToolTip(tr("Highlight all occurences of searched pattern"));
    searchedWordAct->setCheckable(true);
    connect(searchedWordAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightSearchedWord);

    // Expand Tab into spaces.
    QAction *expandTabAct = new QAction(tr("&Expand Tab"), this);
    expandTabAct->setToolTip(tr("Expand entered Tab to spaces"));
    expandTabAct->setCheckable(true);
    connect(expandTabAct, &QAction::triggered,
            this, &VMainWindow::changeExpandTab);

    // Tab stop width.
    QActionGroup *tabStopWidthAct = new QActionGroup(this);
    QAction *twoSpaceTabAct = new QAction(tr("2 Spaces"), tabStopWidthAct);
    twoSpaceTabAct->setToolTip(tr("Expand Tab to 2 spaces"));
    twoSpaceTabAct->setCheckable(true);
    twoSpaceTabAct->setData(2);
    QAction *fourSpaceTabAct = new QAction(tr("4 Spaces"), tabStopWidthAct);
    fourSpaceTabAct->setToolTip(tr("Expand Tab to 4 spaces"));
    fourSpaceTabAct->setCheckable(true);
    fourSpaceTabAct->setData(4);
    QAction *eightSpaceTabAct = new QAction(tr("8 Spaces"), tabStopWidthAct);
    eightSpaceTabAct->setToolTip(tr("Expand Tab to 8 spaces"));
    eightSpaceTabAct->setCheckable(true);
    eightSpaceTabAct->setData(8);
    connect(tabStopWidthAct, &QActionGroup::triggered,
            this, &VMainWindow::setTabStopWidth);

    // Auto Indent.
    m_autoIndentAct = new QAction(tr("Auto Indent"), this);
    m_autoIndentAct->setToolTip(tr("Indent automatically when inserting a new line"));
    m_autoIndentAct->setCheckable(true);
    connect(m_autoIndentAct, &QAction::triggered,
            this, &VMainWindow::changeAutoIndent);

    // Auto List.
    QAction *autoListAct = new QAction(tr("Auto List"), this);
    autoListAct->setToolTip(tr("Continue the list automatically when inserting a new line"));
    autoListAct->setCheckable(true);
    connect(autoListAct, &QAction::triggered,
            this, &VMainWindow::changeAutoList);

    // Vim Mode.
    QAction *vimAct = new QAction(tr("Vim Mode"), this);
    vimAct->setToolTip(tr("Enable Vim mode for editing (re-open current tabs to make it work)"));
    vimAct->setCheckable(true);
    connect(vimAct, &QAction::triggered,
            this, &VMainWindow::changeVimMode);

    // Smart input method in Vim mode.
    QAction *smartImAct = new QAction(tr("Smart Input Method In Vim Mode"), this);
    smartImAct->setToolTip(tr("Disable input method when leaving Insert mode in Vim mode"));
    smartImAct->setCheckable(true);
    connect(smartImAct, &QAction::triggered,
            this, [this](bool p_checked){
                g_config->setEnableSmartImInVimMode(p_checked);
            });

    // Highlight current cursor line.
    QAction *cursorLineAct = new QAction(tr("Highlight Cursor Line"), this);
    cursorLineAct->setToolTip(tr("Highlight current cursor line"));
    cursorLineAct->setCheckable(true);
    connect(cursorLineAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightCursorLine);

    // Highlight selected word.
    QAction *selectedWordAct = new QAction(tr("Highlight Selected Words"), this);
    selectedWordAct->setToolTip(tr("Highlight all occurences of selected words"));
    selectedWordAct->setCheckable(true);
    connect(selectedWordAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightSelectedWord);

    // Highlight trailing space.
    QAction *trailingSapceAct = new QAction(tr("Highlight Trailing Sapces"), this);
    trailingSapceAct->setToolTip(tr("Highlight all the spaces at the end of a line"));
    trailingSapceAct->setCheckable(true);
    connect(trailingSapceAct, &QAction::triggered,
            this, &VMainWindow::changeHighlightTrailingSapce);

    QMenu *findReplaceMenu = editMenu->addMenu(tr("Find/Replace"));
    findReplaceMenu->setToolTipsVisible(true);
    findReplaceMenu->addAction(m_findReplaceAct);
    findReplaceMenu->addAction(m_findNextAct);
    findReplaceMenu->addAction(m_findPreviousAct);
    findReplaceMenu->addAction(m_replaceAct);
    findReplaceMenu->addAction(m_replaceFindAct);
    findReplaceMenu->addAction(m_replaceAllAct);
    findReplaceMenu->addSeparator();
    findReplaceMenu->addAction(searchedWordAct);
    searchedWordAct->setChecked(g_config->getHighlightSearchedWord());

    m_findReplaceAct->setEnabled(false);
    m_findNextAct->setEnabled(false);
    m_findPreviousAct->setEnabled(false);
    m_replaceAct->setEnabled(false);
    m_replaceFindAct->setEnabled(false);
    m_replaceAllAct->setEnabled(false);

    editMenu->addSeparator();
    editMenu->addAction(expandTabAct);
    if (g_config->getIsExpandTab()) {
        expandTabAct->setChecked(true);
    } else {
        expandTabAct->setChecked(false);
    }

    QMenu *tabStopWidthMenu = editMenu->addMenu(tr("Tab Stop Width"));
    tabStopWidthMenu->setToolTipsVisible(true);
    tabStopWidthMenu->addAction(twoSpaceTabAct);
    tabStopWidthMenu->addAction(fourSpaceTabAct);
    tabStopWidthMenu->addAction(eightSpaceTabAct);
    int tabStopWidth = g_config->getTabStopWidth();
    switch (tabStopWidth) {
    case 2:
        twoSpaceTabAct->setChecked(true);
        break;
    case 4:
        fourSpaceTabAct->setChecked(true);
        break;
    case 8:
        eightSpaceTabAct->setChecked(true);
        break;
    default:
        qWarning() << "unsupported tab stop width" << tabStopWidth <<  "in config";
    }

    editMenu->addAction(m_autoIndentAct);
    m_autoIndentAct->setChecked(g_config->getAutoIndent());

    editMenu->addAction(autoListAct);
    if (g_config->getAutoList()) {
        // Let the trigger handler to trigger m_autoIndentAct, too.
        autoListAct->trigger();
    }
    Q_ASSERT(!(autoListAct->isChecked() && !m_autoIndentAct->isChecked()));

    editMenu->addAction(vimAct);
    vimAct->setChecked(g_config->getEnableVimMode());

    editMenu->addAction(smartImAct);
    smartImAct->setChecked(g_config->getEnableSmartImInVimMode());

    editMenu->addSeparator();

    initEditorStyleMenu(editMenu);

    initEditorBackgroundMenu(editMenu);

    initEditorLineNumberMenu(editMenu);

    editMenu->addAction(cursorLineAct);
    cursorLineAct->setChecked(g_config->getHighlightCursorLine());

    editMenu->addAction(selectedWordAct);
    selectedWordAct->setChecked(g_config->getHighlightSelectedWord());

    editMenu->addAction(trailingSapceAct);
    trailingSapceAct->setChecked(g_config->getEnableTrailingSpaceHighlight());
}

void VMainWindow::initDockWindows()
{
    toolDock = new QDockWidget(tr("Tools"), this);
    toolDock->setObjectName("ToolsDock");
    toolDock->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);

    // Outline tree.
    outline = new VOutline(this);
    connect(editArea, &VEditArea::outlineChanged,
            outline, &VOutline::updateOutline);
    connect(editArea, &VEditArea::currentHeaderChanged,
            outline, &VOutline::updateCurrentHeader);
    connect(outline, &VOutline::outlineItemActivated,
            editArea, &VEditArea::scrollToHeader);

    // Snippets.
    m_snippetList = new VSnippetList(this);

    m_toolBox = new VToolBox(this);
    m_toolBox->addItem(outline,
                       ":/resources/icons/outline.svg",
                       tr("Outline"));
    m_toolBox->addItem(m_snippetList,
                       ":/resources/icons/snippets.svg",
                       tr("Snippets"));

    toolDock->setWidget(m_toolBox);
    addDockWidget(Qt::RightDockWidgetArea, toolDock);

    QAction *toggleAct = toolDock->toggleViewAction();
    toggleAct->setToolTip(tr("Toggle the tools dock widget"));
    viewMenu->addAction(toggleAct);
}

void VMainWindow::importNoteFromFile()
{
    static QString lastPath = QDir::homePath();
    QStringList files = QFileDialog::getOpenFileNames(this,
                                                      tr("Select Files To Create Notes"),
                                                      lastPath);
    if (files.isEmpty()) {
        return;
    }

    // Update lastPath
    lastPath = QFileInfo(files[0]).path();

    QString msg;
    if (!m_fileList->importFiles(files, &msg)) {
        VUtils::showMessage(QMessageBox::Warning,
                            tr("Warning"),
                            tr("Fail to create notes for all the files."),
                            msg,
                            QMessageBox::Ok,
                            QMessageBox::Ok,
                            this);
    } else {
        int cnt = files.size();
        showStatusMessage(tr("%1 %2 created from external files")
                            .arg(cnt)
                            .arg(cnt > 1 ? tr("notes") : tr("note")));
    }
}

void VMainWindow::changeMarkdownConverter(QAction *action)
{
    if (!action) {
        return;
    }

    MarkdownConverterType type = (MarkdownConverterType)action->data().toInt();

    qDebug() << "switch to converter" << type;

    g_config->setMarkdownConverterType(type);
}

void VMainWindow::aboutMessage()
{
    QString info = tr("<span style=\"font-weight: bold;\">v%1</span>").arg(VConfigManager::c_version);
    info += "<br/><br/>";
    info += tr("VNote is a Vim-inspired note-taking application for Markdown.");
    info += "<br/>";
    info += tr("Please visit <a href=\"https://github.com/tamlok/vnote.git\">Github</a> for more information.");
    QMessageBox::about(this, tr("About VNote"), info);
}

void VMainWindow::changeExpandTab(bool checked)
{
    g_config->setIsExpandTab(checked);
}

void VMainWindow::enableMermaid(bool p_checked)
{
    g_config->setEnableMermaid(p_checked);
}

void VMainWindow::enableMathjax(bool p_checked)
{
    g_config->setEnableMathjax(p_checked);
}

void VMainWindow::changeHighlightCursorLine(bool p_checked)
{
    g_config->setHighlightCursorLine(p_checked);
}

void VMainWindow::changeHighlightSelectedWord(bool p_checked)
{
    g_config->setHighlightSelectedWord(p_checked);
}

void VMainWindow::changeHighlightSearchedWord(bool p_checked)
{
    g_config->setHighlightSearchedWord(p_checked);
}

void VMainWindow::changeHighlightTrailingSapce(bool p_checked)
{
    g_config->setEnableTrailingSapceHighlight(p_checked);
}

void VMainWindow::setTabStopWidth(QAction *action)
{
    if (!action) {
        return;
    }
    g_config->setTabStopWidth(action->data().toInt());
}

void VMainWindow::setEditorBackgroundColor(QAction *action)
{
    if (!action) {
        return;
    }

    g_config->setCurBackgroundColor(action->data().toString());
}

void VMainWindow::initConverterMenu(QMenu *p_menu)
{
    QMenu *converterMenu = p_menu->addMenu(tr("&Converter"));
    converterMenu->setToolTipsVisible(true);

    QActionGroup *converterAct = new QActionGroup(this);
    QAction *markedAct = new QAction(tr("Marked"), converterAct);
    markedAct->setToolTip(tr("Use Marked to convert Markdown to HTML (re-open current tabs to make it work)"));
    markedAct->setCheckable(true);
    markedAct->setData(int(MarkdownConverterType::Marked));

    QAction *hoedownAct = new QAction(tr("Hoedown"), converterAct);
    hoedownAct->setToolTip(tr("Use Hoedown to convert Markdown to HTML (re-open current tabs to make it work)"));
    hoedownAct->setCheckable(true);
    hoedownAct->setData(int(MarkdownConverterType::Hoedown));

    QAction *markdownitAct = new QAction(tr("Markdown-it"), converterAct);
    markdownitAct->setToolTip(tr("Use Markdown-it to convert Markdown to HTML (re-open current tabs to make it work)"));
    markdownitAct->setCheckable(true);
    markdownitAct->setData(int(MarkdownConverterType::MarkdownIt));

    QAction *showdownAct = new QAction(tr("Showdown"), converterAct);
    showdownAct->setToolTip(tr("Use Showdown to convert Markdown to HTML (re-open current tabs to make it work)"));
    showdownAct->setCheckable(true);
    showdownAct->setData(int(MarkdownConverterType::Showdown));

    connect(converterAct, &QActionGroup::triggered,
            this, &VMainWindow::changeMarkdownConverter);
    converterMenu->addAction(hoedownAct);
    converterMenu->addAction(markedAct);
    converterMenu->addAction(markdownitAct);
    converterMenu->addAction(showdownAct);

    MarkdownConverterType converterType = g_config->getMdConverterType();
    switch (converterType) {
    case MarkdownConverterType::Marked:
        markedAct->setChecked(true);
        break;

    case MarkdownConverterType::Hoedown:
        hoedownAct->setChecked(true);
        break;

    case MarkdownConverterType::MarkdownIt:
        markdownitAct->setChecked(true);
        break;

    case MarkdownConverterType::Showdown:
        showdownAct->setChecked(true);
        break;

    default:
        Q_ASSERT(false);
    }
}

void VMainWindow::initMarkdownitOptionMenu(QMenu *p_menu)
{
    QMenu *optMenu = p_menu->addMenu(tr("Markdown-it Options"));
    optMenu->setToolTipsVisible(true);

    MarkdownitOption opt = g_config->getMarkdownitOption();

    QAction *htmlAct = new QAction(tr("HTML"), this);
    htmlAct->setToolTip(tr("Enable HTML tags in source"));
    htmlAct->setCheckable(true);
    htmlAct->setChecked(opt.m_html);
    connect(htmlAct, &QAction::triggered,
            this, [this](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_html = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *breaksAct = new QAction(tr("Line Break"), this);
    breaksAct->setToolTip(tr("Convert '\\n' in paragraphs into line break"));
    breaksAct->setCheckable(true);
    breaksAct->setChecked(opt.m_breaks);
    connect(breaksAct, &QAction::triggered,
            this, [this](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_breaks = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    QAction *linkifyAct = new QAction(tr("Linkify"), this);
    linkifyAct->setToolTip(tr("Convert URL-like text into links"));
    linkifyAct->setCheckable(true);
    linkifyAct->setChecked(opt.m_linkify);
    connect(linkifyAct, &QAction::triggered,
            this, [this](bool p_checked) {
                MarkdownitOption opt = g_config->getMarkdownitOption();
                opt.m_linkify = p_checked;
                g_config->setMarkdownitOption(opt);
            });

    optMenu->addAction(htmlAct);
    optMenu->addAction(breaksAct);
    optMenu->addAction(linkifyAct);
}

void VMainWindow::initRenderBackgroundMenu(QMenu *menu)
{
    QActionGroup *renderBackgroundAct = new QActionGroup(this);
    connect(renderBackgroundAct, &QActionGroup::triggered,
            this, &VMainWindow::setRenderBackgroundColor);

    QMenu *renderBgMenu = menu->addMenu(tr("&Rendering Background"));
    renderBgMenu->setToolTipsVisible(true);
    const QString &curBgColor = g_config->getCurRenderBackgroundColor();
    QAction *tmpAct = new QAction(tr("System"), renderBackgroundAct);
    tmpAct->setToolTip(tr("Use system's background color configuration for Markdown rendering"));
    tmpAct->setCheckable(true);
    tmpAct->setData("System");
    if (curBgColor == "System") {
        tmpAct->setChecked(true);
    }
    renderBgMenu->addAction(tmpAct);

    const QVector<VColor> &bgColors = g_config->getCustomColors();
    for (int i = 0; i < bgColors.size(); ++i) {
        tmpAct = new QAction(bgColors[i].m_name, renderBackgroundAct);
        tmpAct->setToolTip(tr("Set as the background color for Markdown rendering"));
        tmpAct->setCheckable(true);
        tmpAct->setData(bgColors[i].m_name);

#if !defined(Q_OS_MACOS) && !defined(Q_OS_MAC)
        QColor color(bgColors[i].m_color);
        QPixmap pixmap(COLOR_PIXMAP_ICON_SIZE, COLOR_PIXMAP_ICON_SIZE);
        pixmap.fill(color);
        tmpAct->setIcon(QIcon(pixmap));
#endif

        if (curBgColor == bgColors[i].m_name) {
            tmpAct->setChecked(true);
        }

        renderBgMenu->addAction(tmpAct);
    }
}

void VMainWindow::initRenderStyleMenu(QMenu *p_menu)
{
    QMenu *styleMenu = p_menu->addMenu(tr("Rendering &Style"));
    styleMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Style"),
                                styleMenu);
    addAct->setToolTip(tr("Add custom style of read mode"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_style.md"),
                                   tr("Add Style"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getStyleConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    styleMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [this](QAction *p_action) {
                if (!p_action) {
                    return;
                }

                QString data = p_action->data().toString();
                g_config->setCssStyle(data);
                vnote->updateTemplate();
            });

    QList<QString> styles = g_config->getCssStyles();
    QString curStyle = g_config->getCssStyle();
    for (auto const &style : styles) {
        QAction *act = new QAction(style, ag);
        act->setToolTip(tr("Set as the CSS style for Markdown rendering "
                           "(re-open current tabs to make it work)"));
        act->setCheckable(true);
        act->setData(style);

        // Add it to the menu.
        styleMenu->addAction(act);

        if (curStyle == style) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::initCodeBlockStyleMenu(QMenu *p_menu)
{
    QMenu *styleMenu = p_menu->addMenu(tr("Code Block Style"));
    styleMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Style"),
                                styleMenu);
    addAct->setToolTip(tr("Add custom style of code block in read mode"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_style.md"),
                                   tr("Add Style"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getCodeBlockStyleConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    styleMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [this](QAction *p_action) {
                if (!p_action) {
                    return;
                }

                QString data = p_action->data().toString();
                g_config->setCodeBlockCssStyle(data);
                vnote->updateTemplate();
            });

    QList<QString> styles = g_config->getCodeBlockCssStyles();
    QString curStyle = g_config->getCodeBlockCssStyle();
    for (auto const &style : styles) {
        QAction *act = new QAction(style, ag);
        act->setToolTip(tr("Set as the code block CSS style for Markdown rendering "
                           "(re-open current tabs to make it work)"));
        act->setCheckable(true);
        act->setData(style);

        // Add it to the menu.
        styleMenu->addAction(act);

        if (curStyle == style) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::initEditorBackgroundMenu(QMenu *menu)
{
    QMenu *backgroundColorMenu = menu->addMenu(tr("&Background Color"));
    backgroundColorMenu->setToolTipsVisible(true);

    QActionGroup *backgroundColorAct = new QActionGroup(this);
    connect(backgroundColorAct, &QActionGroup::triggered,
            this, &VMainWindow::setEditorBackgroundColor);

    // System background color
    const QString &curBgColor = g_config->getCurBackgroundColor();
    QAction *tmpAct = new QAction(tr("System"), backgroundColorAct);
    tmpAct->setToolTip(tr("Use system's background color configuration for editor"));
    tmpAct->setCheckable(true);
    tmpAct->setData("System");
    if (curBgColor == "System") {
        tmpAct->setChecked(true);
    }
    backgroundColorMenu->addAction(tmpAct);
    const QVector<VColor> &bgColors = g_config->getCustomColors();
    for (int i = 0; i < bgColors.size(); ++i) {
        tmpAct = new QAction(bgColors[i].m_name, backgroundColorAct);
        tmpAct->setToolTip(tr("Set as the background color for editor"));
        tmpAct->setCheckable(true);
        tmpAct->setData(bgColors[i].m_name);

#if !defined(Q_OS_MACOS) && !defined(Q_OS_MAC)
        QColor color(bgColors[i].m_color);
        QPixmap pixmap(COLOR_PIXMAP_ICON_SIZE, COLOR_PIXMAP_ICON_SIZE);
        pixmap.fill(color);
        tmpAct->setIcon(QIcon(pixmap));
#endif

        if (curBgColor == bgColors[i].m_name) {
            tmpAct->setChecked(true);
        }

        backgroundColorMenu->addAction(tmpAct);
    }
}

void VMainWindow::initEditorLineNumberMenu(QMenu *p_menu)
{
    QMenu *lineNumMenu = p_menu->addMenu(tr("Line Number"));
    lineNumMenu->setToolTipsVisible(true);

    QActionGroup *lineNumAct = new QActionGroup(lineNumMenu);
    connect(lineNumAct, &QActionGroup::triggered,
            this, [this](QAction *p_action){
                if (!p_action) {
                    return;
                }

                g_config->setEditorLineNumber(p_action->data().toInt());
                emit editorConfigUpdated();
            });

    int lineNumberMode = g_config->getEditorLineNumber();

    QAction *act = lineNumAct->addAction(tr("None"));
    act->setToolTip(tr("Do not display line number in edit mode"));
    act->setCheckable(true);
    act->setData(0);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 0) {
        act->setChecked(true);
    }

    act = lineNumAct->addAction(tr("Absolute"));
    act->setToolTip(tr("Display absolute line number in edit mode"));
    act->setCheckable(true);
    act->setData(1);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 1) {
        act->setChecked(true);
    }

    act = lineNumAct->addAction(tr("Relative"));
    act->setToolTip(tr("Display line number relative to current cursor line in edit mode"));
    act->setCheckable(true);
    act->setData(2);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 2) {
        act->setChecked(true);
    }

    act = lineNumAct->addAction(tr("CodeBlock"));
    act->setToolTip(tr("Display line number in code block in edit mode (for Markdown only)"));
    act->setCheckable(true);
    act->setData(3);
    lineNumMenu->addAction(act);
    if (lineNumberMode == 3) {
        act->setChecked(true);
    }
}

void VMainWindow::initEditorStyleMenu(QMenu *p_menu)
{
    QMenu *styleMenu = p_menu->addMenu(tr("Editor &Style"));
    styleMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Style"),
                                styleMenu);
    addAct->setToolTip(tr("Add custom style of editor"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_style.md"),
                                   tr("Add Style"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getStyleConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    styleMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [this](QAction *p_action) {
                if (!p_action) {
                    return;
                }

                QString data = p_action->data().toString();
                g_config->setEditorStyle(data);
            });

    QList<QString> styles = g_config->getEditorStyles();
    QString style = g_config->getEditorStyle();
    for (auto const &item : styles) {
        QAction *act = new QAction(item, ag);
        act->setToolTip(tr("Set as the editor style (re-open current tabs to make it work)"));
        act->setCheckable(true);
        act->setData(item);

        // Add it to the menu.
        styleMenu->addAction(act);

        if (style == item) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::setRenderBackgroundColor(QAction *action)
{
    if (!action) {
        return;
    }
    g_config->setCurRenderBackgroundColor(action->data().toString());
    vnote->updateTemplate();
}

void VMainWindow::updateActionsStateFromTab(const VEditTab *p_tab)
{
    const VFile *file = p_tab ? p_tab->getFile() : NULL;
    bool editMode = p_tab ? p_tab->isEditMode() : false;
    bool systemFile = file
                      && file->getType() == FileType::Orphan
                      && dynamic_cast<const VOrphanFile *>(file)->isSystemFile();

    m_printAct->setEnabled(file && file->getDocType() == DocType::Markdown);
    m_exportAsPDFAct->setEnabled(file && file->getDocType() == DocType::Markdown);

    discardExitAct->setVisible(file && editMode);
    saveExitAct->setVisible(file && editMode);
    editNoteAct->setEnabled(file && !editMode);
    editNoteAct->setVisible(!saveExitAct->isVisible());
    saveNoteAct->setEnabled(file && editMode && file->isModifiable());
    deleteNoteAct->setEnabled(file && file->getType() == FileType::Note);
    noteInfoAct->setEnabled(file && !systemFile);

    m_attachmentBtn->setEnabled(file && file->getType() == FileType::Note);

    m_headingBtn->setEnabled(file && editMode);

    setActionsEnabled(m_editToolBar, file && editMode);

    // Handle heading sequence act independently.
    m_headingSequenceAct->setEnabled(isHeadingSequenceApplicable());
    const VMdTab *mdTab = dynamic_cast<const VMdTab *>(p_tab);
    m_headingSequenceAct->setChecked(mdTab && mdTab->isHeadingSequenceEnabled());

    // Find/Replace
    m_findReplaceAct->setEnabled(file);
    m_findNextAct->setEnabled(file);
    m_findPreviousAct->setEnabled(file);
    m_replaceAct->setEnabled(file && editMode);
    m_replaceFindAct->setEnabled(file && editMode);
    m_replaceAllAct->setEnabled(file && editMode);

    if (!file) {
        m_findReplaceDialog->closeDialog();
    }
}

void VMainWindow::handleAreaTabStatusUpdated(const VEditTabInfo &p_info)
{
    m_curTab = p_info.m_editTab;
    if (m_curTab) {
        m_curFile = m_curTab->getFile();
    } else {
        m_curFile = NULL;
    }

    if (p_info.m_type == VEditTabInfo::InfoType::All) {
        updateActionsStateFromTab(m_curTab);

        m_attachmentList->setFile(dynamic_cast<VNoteFile *>(m_curFile.data()));

        QString title;
        if (m_curFile) {
            m_findReplaceDialog->updateState(m_curFile->getDocType(),
                                             m_curTab->isEditMode());

            if (m_curFile->getType() == FileType::Note) {
                const VNoteFile *tmpFile = dynamic_cast<const VNoteFile *>((VFile *)m_curFile);
                title = QString("[%1] %2").arg(tmpFile->getNotebookName()).arg(tmpFile->fetchPath());
            } else {
                title = QString("%1").arg(m_curFile->fetchPath());
            }

            if (!m_curFile->isModifiable()) {
                title.append('#');
            }

            if (m_curTab->isModified()) {
                title.append('*');
            }
        }

        updateWindowTitle(title);
    }

    updateStatusInfo(p_info);
}

void VMainWindow::onePanelView()
{
    m_panelViewState = PanelViewState::SinglePanel;
    g_config->setEnableCompactMode(false);
    changePanelView(m_panelViewState);
}

void VMainWindow::twoPanelView()
{
    m_panelViewState = PanelViewState::TwoPanels;
    g_config->setEnableCompactMode(false);
    changePanelView(m_panelViewState);
}

void VMainWindow::compactModeView()
{
    m_panelViewState = PanelViewState::CompactMode;
    g_config->setEnableCompactMode(true);
    changePanelView(m_panelViewState);
}

void VMainWindow::enableCompactMode(bool p_enabled)
{
    const int fileListIdx = 1;
    bool isCompactMode = m_naviSplitter->indexOf(m_fileList) != -1;
    if (p_enabled) {
        // Change to compact mode.
        if (isCompactMode) {
            return;
        }

        // Take m_fileList out of m_mainSplitter.
        QWidget *tmpWidget = new QWidget(this);
        Q_ASSERT(fileListIdx == m_mainSplitter->indexOf(m_fileList));
        m_fileList->hide();
        m_mainSplitter->replaceWidget(fileListIdx, tmpWidget);
        tmpWidget->hide();

        // Insert m_fileList into m_naviSplitter.
        QWidget *wid = m_naviSplitter->replaceWidget(fileListIdx, m_fileList);
        delete wid;

        m_fileList->show();
    } else {
        // Disable compact mode and go back to two panels view.
        if (!isCompactMode) {
            return;
        }

        // Take m_fileList out of m_naviSplitter.
        Q_ASSERT(fileListIdx == m_naviSplitter->indexOf(m_fileList));
        QWidget *tmpWidget = new QWidget(this);
        m_fileList->hide();
        m_naviSplitter->replaceWidget(fileListIdx, tmpWidget);
        tmpWidget->hide();

        // Insert m_fileList into m_mainSplitter.
        QWidget *wid = m_mainSplitter->replaceWidget(fileListIdx, m_fileList);
        delete wid;

        m_fileList->show();
    }

    // Set Tab order.
    setTabOrder(directoryTree, m_fileList->getContentWidget());
}

void VMainWindow::changePanelView(PanelViewState p_state)
{
    switch (p_state) {
    case PanelViewState::ExpandMode:
        m_mainSplitter->widget(0)->hide();
        m_mainSplitter->widget(1)->hide();
        m_mainSplitter->widget(2)->show();
        break;

    case PanelViewState::SinglePanel:
        enableCompactMode(false);

        m_mainSplitter->widget(0)->hide();
        m_mainSplitter->widget(1)->show();
        m_mainSplitter->widget(2)->show();
        break;

    case PanelViewState::TwoPanels:
        enableCompactMode(false);

        m_mainSplitter->widget(0)->show();
        m_mainSplitter->widget(1)->show();
        m_mainSplitter->widget(2)->show();
        break;

    case PanelViewState::CompactMode:
        m_mainSplitter->widget(0)->show();
        m_mainSplitter->widget(1)->hide();
        m_mainSplitter->widget(2)->show();

        enableCompactMode(true);
        break;

    default:
        break;
    }

    // Change the action state.
    QList<QAction *> acts = m_viewActGroup->actions();
    for (auto & act : acts) {
        if (act->data().toInt() == (int)p_state) {
            act->setChecked(true);
        } else {
            act->setChecked(false);
        }
    }

    if (p_state != PanelViewState::ExpandMode) {
        expandViewAct->setChecked(false);
    }
}

void VMainWindow::updateWindowTitle(const QString &str)
{
    QString title = "VNote";
    if (!str.isEmpty()) {
        title = title + " - " + str;
    }
    setWindowTitle(title);
}

void VMainWindow::curEditFileInfo()
{
    Q_ASSERT(m_curFile);

    if (m_curFile->getType() == FileType::Note) {
        VNoteFile *file = dynamic_cast<VNoteFile *>((VFile *)m_curFile);
        Q_ASSERT(file);
        m_fileList->fileInfo(file);
    } else if (m_curFile->getType() == FileType::Orphan) {
        VOrphanFile *file = dynamic_cast<VOrphanFile *>((VFile *)m_curFile);
        Q_ASSERT(file);
        if (!file->isSystemFile()) {
            editOrphanFileInfo(m_curFile);
        }
    }
}

void VMainWindow::deleteCurNote()
{
    if (!m_curFile || m_curFile->getType() != FileType::Note) {
        return;
    }

    VNoteFile *file = dynamic_cast<VNoteFile *>((VFile *)m_curFile);
    m_fileList->deleteFile(file);
}

void VMainWindow::closeEvent(QCloseEvent *event)
{
    bool isExit = m_requestQuit || !g_config->getMinimizeToStystemTray();
    m_requestQuit = false;

#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
    // Do not support minimized to tray on macOS.
    isExit = true;
#endif

    if (!isExit && g_config->getMinimizeToStystemTray() == -1) {
        // Not initialized yet. Prompt for user.
        int ret = VUtils::showMessage(QMessageBox::Information,
                                      tr("Close VNote"),
                                      tr("Do you want to minimize VNote to system tray "
                                         "instead of quitting it when closing VNote?"),
                                      tr("You could change the option in Settings later."),
                                      QMessageBox::Ok | QMessageBox::No | QMessageBox::Cancel,
                                      QMessageBox::Ok,
                                      this);
        if (ret == QMessageBox::Ok) {
            g_config->setMinimizeToSystemTray(1);
        } else if (ret == QMessageBox::No) {
            g_config->setMinimizeToSystemTray(0);
            isExit = true;
        } else {
            event->ignore();
            return;
        }
    }

    if (isVisible()) {
        saveStateAndGeometry();
    }

    if (isExit || !m_trayIcon->isVisible()) {
        // Get all the opened tabs.
        bool saveOpenedNotes = g_config->getStartupPageType() == StartupPageType::ContinueLeftOff;
        QVector<VFileSessionInfo> fileInfos;
        QVector<VEditTabInfo> tabs;
        if (saveOpenedNotes) {
            tabs = editArea->getAllTabsInfo();

            fileInfos.reserve(tabs.size());

            for (auto const & tab : tabs) {
                // Skip system file.
                VFile *file = tab.m_editTab->getFile();
                if (file->getType() == FileType::Orphan
                    && dynamic_cast<VOrphanFile *>(file)->isSystemFile()) {
                    continue;
                }

                VFileSessionInfo info = VFileSessionInfo::fromEditTabInfo(&tab);
                fileInfos.push_back(info);

                qDebug() << "file session:" << info.m_file << (info.m_mode == OpenFileMode::Edit);
            }
        }

        if (!editArea->closeAllFiles(false)) {
            // Fail to close all the opened files, cancel closing app.
            event->ignore();
            return;
        }

        if (saveOpenedNotes) {
            g_config->setLastOpenedFiles(fileInfos);
        }

        QMainWindow::closeEvent(event);
    } else {
        hide();
        event->ignore();
    }
}

void VMainWindow::saveStateAndGeometry()
{
    g_config->setMainWindowGeometry(saveGeometry());
    g_config->setMainWindowState(saveState());
    g_config->setToolsDockChecked(toolDock->isVisible());

    if (m_panelViewState == PanelViewState::CompactMode) {
        g_config->setNaviSplitterState(m_naviSplitter->saveState());
        g_config->setMainSplitterState(m_mainSplitter->saveState());
    } else {
        // In one panel view, it will save the wrong state that the directory tree
        // panel has a width of zero.
        changePanelView(PanelViewState::TwoPanels);
        g_config->setMainSplitterState(m_mainSplitter->saveState());
    }
}

void VMainWindow::restoreStateAndGeometry()
{
    const QByteArray &geometry = g_config->getMainWindowGeometry();
    if (!geometry.isEmpty()) {
        restoreGeometry(geometry);
    }
    const QByteArray &state = g_config->getMainWindowState();
    if (!state.isEmpty()) {
        restoreState(state);
    }
    toolDock->setVisible(g_config->getToolsDockChecked());

    const QByteArray &splitterState = g_config->getMainSplitterState();
    if (!splitterState.isEmpty()) {
        m_mainSplitter->restoreState(splitterState);
    }

    const QByteArray &naviSplitterState = g_config->getNaviSplitterState();
    if (!naviSplitterState.isEmpty()) {
        m_naviSplitter->restoreState(naviSplitterState);
    }
}

void VMainWindow::handleCurrentDirectoryChanged(const VDirectory *p_dir)
{
    newNoteAct->setEnabled(p_dir);
    m_importNoteAct->setEnabled(p_dir);
}

void VMainWindow::handleCurrentNotebookChanged(const VNotebook *p_notebook)
{
    newRootDirAct->setEnabled(p_notebook);
}

void VMainWindow::keyPressEvent(QKeyEvent *event)
{
    int key = event->key();
    Qt::KeyboardModifiers modifiers = event->modifiers();
    if (key == Qt::Key_Escape
        || (key == Qt::Key_BracketLeft
            && modifiers == Qt::ControlModifier)) {
        m_findReplaceDialog->closeDialog();
        event->accept();
        return;
    }
    QMainWindow::keyPressEvent(event);
}

bool VMainWindow::locateFile(VFile *p_file)
{
    bool ret = false;
    if (!p_file || p_file->getType() != FileType::Note) {
        return ret;
    }

    VNoteFile *file = dynamic_cast<VNoteFile *>(p_file);
    VNotebook *notebook = file->getNotebook();
    if (notebookSelector->locateNotebook(notebook)) {
        while (directoryTree->currentNotebook() != notebook) {
            QCoreApplication::sendPostedEvents();
        }

        VDirectory *dir = file->getDirectory();
        if (directoryTree->locateDirectory(dir)) {
            while (m_fileList->currentDirectory() != dir) {
                QCoreApplication::sendPostedEvents();
            }

            if (m_fileList->locateFile(file)) {
                ret = true;
                m_fileList->setFocus();
            }
        }
    }

    // Open the directory and file panels after location.
    if (m_panelViewState == PanelViewState::CompactMode) {
        compactModeView();
    } else {
        twoPanelView();
    }

    return ret;
}

void VMainWindow::handleFindDialogTextChanged(const QString &p_text, uint /* p_options */)
{
    bool enabled = true;
    if (p_text.isEmpty()) {
        enabled = false;
    }
    m_findNextAct->setEnabled(enabled);
    m_findPreviousAct->setEnabled(enabled);
    m_replaceAct->setEnabled(enabled);
    m_replaceFindAct->setEnabled(enabled);
    m_replaceAllAct->setEnabled(enabled);
}

void VMainWindow::openFindDialog()
{
    m_findReplaceDialog->openDialog(editArea->getSelectedText());
}

void VMainWindow::viewSettings()
{
    VSettingsDialog settingsDialog(this);
    settingsDialog.exec();
}

void VMainWindow::closeCurrentFile()
{
    if (m_curFile) {
        editArea->closeFile(m_curFile, false);
    }
}

void VMainWindow::changeAutoIndent(bool p_checked)
{
    g_config->setAutoIndent(p_checked);
}

void VMainWindow::changeAutoList(bool p_checked)
{
    g_config->setAutoList(p_checked);
    if (p_checked) {
        if (!m_autoIndentAct->isChecked()) {
            m_autoIndentAct->trigger();
        }
        m_autoIndentAct->setEnabled(false);
    } else {
        m_autoIndentAct->setEnabled(true);
    }
}

void VMainWindow::changeVimMode(bool p_checked)
{
    g_config->setEnableVimMode(p_checked);
}

void VMainWindow::enableCodeBlockHighlight(bool p_checked)
{
    g_config->setEnableCodeBlockHighlight(p_checked);
}

void VMainWindow::enableImagePreview(bool p_checked)
{
    g_config->setEnablePreviewImages(p_checked);

    emit editorConfigUpdated();
}

void VMainWindow::enableImagePreviewConstraint(bool p_checked)
{
    g_config->setEnablePreviewImageConstraint(p_checked);

    emit editorConfigUpdated();
}

void VMainWindow::enableImageConstraint(bool p_checked)
{
    g_config->setEnableImageConstraint(p_checked);

    vnote->updateTemplate();
}

void VMainWindow::enableImageCaption(bool p_checked)
{
    g_config->setEnableImageCaption(p_checked);
}

void VMainWindow::shortcutsHelp()
{
    QString docFile = VUtils::getDocFile(VNote::c_shortcutsDocFile);
    VFile *file = vnote->getOrphanFile(docFile, false, true);
    editArea->openFile(file, OpenFileMode::Read);
}

void VMainWindow::printNote()
{
    QPrinter printer;
    QPrintDialog dialog(&printer, this);
    dialog.setWindowTitle(tr("Print Note"));

    V_ASSERT(m_curTab);

    if (m_curFile->getDocType() == DocType::Markdown) {
        VMdTab *mdTab = dynamic_cast<VMdTab *>((VEditTab *)m_curTab);
        VWebView *webView = mdTab->getWebViewer();

        V_ASSERT(webView);

        if (webView->hasSelection()) {
            dialog.addEnabledOption(QAbstractPrintDialog::PrintSelection);
        }

        if (dialog.exec() != QDialog::Accepted) {
            return;
        }
    }
}

void VMainWindow::exportAsPDF()
{
    V_ASSERT(m_curTab);
    V_ASSERT(m_curFile);

    if (m_curFile->getDocType() == DocType::Markdown) {
        VMdTab *mdTab = dynamic_cast<VMdTab *>((VEditTab *)m_curTab);
        VExporter exporter(mdTab->getMarkdownConverterType(), this);
        exporter.exportNote(m_curFile, ExportType::PDF);
        exporter.exec();
    }
}

QAction *VMainWindow::newAction(const QIcon &p_icon,
                                const QString &p_text,
                                QObject *p_parent)
{
#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
    Q_UNUSED(p_icon);
    return new QAction(p_text, p_parent);
#else
    return new QAction(p_icon, p_text, p_parent);
#endif
}

void VMainWindow::showStatusMessage(const QString &p_msg)
{
    const int timeout = 3000;
    statusBar()->showMessage(p_msg, timeout);
}

void VMainWindow::updateStatusInfo(const VEditTabInfo &p_info)
{
    if (m_curTab) {
        m_tabIndicator->update(p_info);
        m_tabIndicator->show();

        if (m_curTab->isEditMode()) {
            if (p_info.m_type == VEditTabInfo::InfoType::All) {
                m_curTab->requestUpdateVimStatus();
            }
        } else {
            m_vimIndicator->hide();
        }
    } else {
        m_tabIndicator->hide();
        m_vimIndicator->hide();
    }
}

void VMainWindow::handleVimStatusUpdated(const VVim *p_vim)
{
    m_vimIndicator->update(p_vim, m_curTab);
    if (!p_vim || !m_curTab || !m_curTab->isEditMode()) {
        m_vimIndicator->hide();
    } else {
        m_vimIndicator->show();
    }
}

bool VMainWindow::tryOpenInternalFile(const QString &p_filePath)
{
    if (p_filePath.isEmpty()) {
        return false;
    }

    if (QFileInfo::exists(p_filePath)) {
        VFile *file = vnote->getInternalFile(p_filePath);

        if (file) {
            editArea->openFile(file, OpenFileMode::Read);
            return true;
        }
    }

    return false;
}

void VMainWindow::openFiles(const QStringList &p_files,
                            bool p_forceOrphan,
                            OpenFileMode p_mode,
                            bool p_forceMode)
{
    for (int i = 0; i < p_files.size(); ++i) {
        VFile *file = NULL;
        if (!p_forceOrphan) {
            file = vnote->getInternalFile(p_files[i]);
        }

        if (!file) {
            file = vnote->getOrphanFile(p_files[i], true);
        }

        editArea->openFile(file, p_mode, p_forceMode);
    }
}

void VMainWindow::editOrphanFileInfo(VFile *p_file)
{
    VOrphanFile *file = dynamic_cast<VOrphanFile *>(p_file);
    Q_ASSERT(file);

    VOrphanFileInfoDialog dialog(file, this);
    if (dialog.exec() == QDialog::Accepted) {
        QString imgFolder = dialog.getImageFolder();
        file->setImageFolder(imgFolder);
    }
}

void VMainWindow::checkSharedMemory()
{
    QStringList files = m_guard->fetchFilesToOpen();
    if (!files.isEmpty()) {
        qDebug() << "shared memory fetch files" << files;
        openFiles(files);

        // Eliminate the signal.
        m_guard->fetchAskedToShow();

        showMainWindow();
    } else if (m_guard->fetchAskedToShow()) {
        qDebug() << "shared memory asked to show up";
        showMainWindow();
    }
}

void VMainWindow::initTrayIcon()
{
    QMenu *menu = new QMenu(this);
    QAction *showMainWindowAct = menu->addAction(tr("Show VNote"));
    connect(showMainWindowAct, &QAction::triggered,
            this, &VMainWindow::showMainWindow);

    QAction *exitAct = menu->addAction(tr("Quit"));
    connect(exitAct, &QAction::triggered,
            this, &VMainWindow::quitApp);

    m_trayIcon = new QSystemTrayIcon(QIcon(":/resources/icons/32x32/vnote.png"), this);
    m_trayIcon->setToolTip(tr("VNote"));
    m_trayIcon->setContextMenu(menu);

    connect(m_trayIcon, &QSystemTrayIcon::activated,
            this, [this](QSystemTrayIcon::ActivationReason p_reason){
                if (p_reason == QSystemTrayIcon::Trigger) {
                    this->showMainWindow();
                }
            });

    m_trayIcon->show();
}

void VMainWindow::changeEvent(QEvent *p_event)
{
    if (p_event->type() == QEvent::WindowStateChange) {
        QWindowStateChangeEvent *eve = dynamic_cast<QWindowStateChangeEvent *>(p_event);
        m_windowOldState = eve->oldState();
    }

    QMainWindow::changeEvent(p_event);
}

void VMainWindow::showMainWindow()
{
    if (this->isMinimized()) {
        if (m_windowOldState & Qt::WindowMaximized) {
            this->showMaximized();
        } else if (m_windowOldState & Qt::WindowFullScreen) {
            this->showFullScreen();
        } else {
            this->showNormal();
        }
    } else {
        this->show();
        // Need to call raise() in macOS.
        this->raise();
    }

    this->activateWindow();
}

void VMainWindow::openStartupPages()
{
    StartupPageType type = g_config->getStartupPageType();
    switch (type) {
    case StartupPageType::ContinueLeftOff:
    {
        QVector<VFileSessionInfo> files = g_config->getLastOpenedFiles();
        qDebug() << "open" << files.size() << "last opened files";
        editArea->openFiles(files);
        break;
    }

    case StartupPageType::SpecificPages:
    {
        QStringList pagesToOpen = VUtils::filterFilePathsToOpen(g_config->getStartupPages());
        qDebug() << "open startup pages" << pagesToOpen;
        openFiles(pagesToOpen);
        break;
    }

    default:
        break;
    }
}

bool VMainWindow::isHeadingSequenceApplicable() const
{
    if (!m_curTab) {
        return false;
    }

    Q_ASSERT(m_curFile);

    if (!m_curFile->isModifiable()
        || m_curFile->getDocType() != DocType::Markdown) {
        return false;
    }

    return true;
}

// Popup the attachment list if it is enabled.
bool VMainWindow::showAttachmentListByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->m_attachmentBtn->isEnabled()) {
        obj->m_attachmentBtn->showPopupWidget();
    }

    return true;
}

bool VMainWindow::locateCurrentFileByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->m_curFile) {
        if (obj->locateFile(obj->m_curFile)) {
            return false;
        }
    }

    return true;
}

bool VMainWindow::toggleExpandModeByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->expandViewAct->trigger();
    return true;
}

bool VMainWindow::toggleOnePanelViewByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->m_panelViewState == PanelViewState::TwoPanels) {
        obj->onePanelView();
    } else {
        obj->twoPanelView();
    }

    return true;
}

bool VMainWindow::discardAndReadByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    if (obj->m_curTab) {
        obj->discardExitAct->trigger();
        obj->m_curTab->setFocus();

        return false;
    }

    return true;
}

bool VMainWindow::toggleToolsDockByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->toolDock->setVisible(!obj->toolDock->isVisible());
    return true;
}

bool VMainWindow::closeFileByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->closeCurrentFile();

    QWidget *nextFocus = obj->editArea->getCurrentTab();
    if (nextFocus) {
        nextFocus->setFocus();
    } else {
        obj->m_fileList->setFocus();
    }

    return false;
}

bool VMainWindow::shortcutsHelpByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_data);
    VMainWindow *obj = static_cast<VMainWindow *>(p_target);
    obj->shortcutsHelp();
    return false;
}

bool VMainWindow::flushLogFileByCaptain(void *p_target, void *p_data)
{
    Q_UNUSED(p_target);
    Q_UNUSED(p_data);

#if defined(QT_NO_DEBUG)
    // Flush g_logFile.
    g_logFile.flush();
#endif

    return true;
}

void VMainWindow::promptNewNotebookIfEmpty()
{
    if (vnote->getNotebooks().isEmpty()) {
        notebookSelector->newNotebook();
    }
}

void VMainWindow::initShortcuts()
{
    QString keySeq = g_config->getShortcutKeySequence("CloseNote");
    qDebug() << "set CloseNote shortcut to" << keySeq;
    if (!keySeq.isEmpty()) {
        QShortcut *closeNoteShortcut = new QShortcut(QKeySequence(keySeq), this);
        closeNoteShortcut->setContext(Qt::WidgetWithChildrenShortcut);
        connect(closeNoteShortcut, &QShortcut::activated,
                this, &VMainWindow::closeCurrentFile);
    }
}

void VMainWindow::openFlashPage()
{
    openFiles(QStringList() << g_config->getFlashPage(),
              false,
              OpenFileMode::Edit,
              true);
}

void VMainWindow::initHeadingButton(QToolBar *p_tb)
{
    m_headingBtn = new QPushButton(VIconUtils::toolButtonIcon(":/resources/icons/heading.svg"),
                                   "",
                                   this);
    m_headingBtn->setToolTip(tr("Headings"));
    m_headingBtn->setProperty("CornerBtn", true);
    m_headingBtn->setFocusPolicy(Qt::NoFocus);
    m_headingBtn->setEnabled(false);

    QMenu *menu = new QMenu(this);
    QString text(tr("Heading %1"));
    QString tooltip(tr("Heading %1\t%2"));
    QWidgetAction *wact = new QWidgetAction(menu);
    wact->setData(1);
    VButtonMenuItem *w = new VButtonMenuItem(wact, text.arg(1), this);
    w->setToolTip(tooltip.arg(1).arg(VUtils::getShortcutText("Ctrl+1")));
    w->setProperty("Heading1", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(2);
    w = new VButtonMenuItem(wact, text.arg(2), this);
    w->setToolTip(tooltip.arg(2).arg(VUtils::getShortcutText("Ctrl+2")));
    w->setProperty("Heading2", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(3);
    w = new VButtonMenuItem(wact, text.arg(3), this);
    w->setToolTip(tooltip.arg(3).arg(VUtils::getShortcutText("Ctrl+3")));
    w->setProperty("Heading3", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(4);
    w = new VButtonMenuItem(wact, text.arg(4), this);
    w->setToolTip(tooltip.arg(4).arg(VUtils::getShortcutText("Ctrl+4")));
    w->setProperty("Heading4", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(5);
    w = new VButtonMenuItem(wact, text.arg(5), this);
    w->setToolTip(tooltip.arg(5).arg(VUtils::getShortcutText("Ctrl+5")));
    w->setProperty("Heading5", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(6);
    w = new VButtonMenuItem(wact, text.arg(6), this);
    w->setToolTip(tooltip.arg(6).arg(VUtils::getShortcutText("Ctrl+6")));
    w->setProperty("Heading6", true);
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    wact = new QWidgetAction(menu);
    wact->setData(0);
    w = new VButtonMenuItem(wact, tr("Clear"), this);
    w->setToolTip(tr("Clear\t%1").arg(VUtils::getShortcutText("Ctrl+7")));
    wact->setDefaultWidget(w);
    menu->addAction(wact);

    connect(menu, &QMenu::triggered,
            this, [this, menu](QAction *p_action) {
                if (m_curTab) {
                    int level = p_action->data().toInt();
                    m_curTab->decorateText(TextDecoration::Heading, level);
                }

                menu->hide();
            });

    m_headingBtn->setMenu(menu);
    p_tb->addWidget(m_headingBtn);
}

void VMainWindow::initThemeMenu(QMenu *p_menu)
{
    QMenu *themeMenu = p_menu->addMenu(tr("Theme"));
    themeMenu->setToolTipsVisible(true);

    QAction *addAct = newAction(VIconUtils::menuIcon(":/resources/icons/add_style.svg"),
                                tr("Add Theme"),
                                themeMenu);
    addAct->setToolTip(tr("Add custom theme"));
    connect(addAct, &QAction::triggered,
            this, [this]() {
                VTipsDialog dialog(VUtils::getDocFile("tips_add_theme.md"),
                                   tr("Add Theme"),
                                   []() {
                                       QUrl url = QUrl::fromLocalFile(g_config->getThemeConfigFolder());
                                       QDesktopServices::openUrl(url);
                                   },
                                   this);
                dialog.exec();
            });

    themeMenu->addAction(addAct);

    QActionGroup *ag = new QActionGroup(this);
    connect(ag, &QActionGroup::triggered,
            this, [this](QAction *p_action) {
                if (!p_action) {
                    return;
                }

                QString data = p_action->data().toString();
                g_config->setTheme(data);
            });

    QList<QString> themes = g_config->getThemes();
    QString theme = g_config->getTheme();
    for (auto const &item : themes) {
        QAction *act = new QAction(item, ag);
        act->setToolTip(tr("Set as the theme of VNote (restart VNote to make it work)"));
        act->setCheckable(true);
        act->setData(item);

        // Add it to the menu.
        themeMenu->addAction(act);

        if (theme == item) {
            act->setChecked(true);
        }
    }
}

void VMainWindow::customShortcut()
{
    VTipsDialog dialog(VUtils::getDocFile("tips_custom_shortcut.md"),
                       tr("Custom Shortcuts"),
                       []() {
#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
                           // On macOS, it seems that we could not open that ini file directly.
                           QUrl url = QUrl::fromLocalFile(g_config->getConfigFolder());
#else
                           QUrl url = QUrl::fromLocalFile(g_config->getConfigFilePath());
#endif
                           QDesktopServices::openUrl(url);
                       },
                       this);
    dialog.exec();
}
